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SSSSS [86.1K]
3 years ago
5

On a blueprint, the scale says that 2 cm represents 3 m. What is the actual length of a wall if it's measurement on the blueprin

t is 7 cm?
Mathematics
1 answer:
Lena [83]3 years ago
3 0

Answer:

7!!

Step-by-step explanation:

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3 years ago
Please help me out!!! :)
alexgriva [62]

Answer:

x = 26°

Step-by-step explanation:

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8 0
4 years ago
A leading magazine (like Barron's) reported at one time that the average number of weeks an individual is unemployed is 27 weeks
miss Akunina [59]

Answer:

X ~ N(27, 4) ;

xbar ~ N(27, 0.1026) ;

0.5 ;

0.5

Step-by-step explanation:

Probability distribution of X : N(μ, σ²)

μ = 27 ; σ = 2

X ~ N(μ, σ²) = X ~ N(27, 2²) ;X ~ N(27, 4)

Distribution is approximately normal ; μ = xbar ; xbar = 27

(Standard Error)² = (σ/√n)²= (2/√39)² = 0.1026

xbar ~ N(μ, σ²) = xbar ~ N(27, 2²) ; xbar ~ N(27, 0.1026)

Probability that a randomly selected individual found a job in less than 27 weeks :

P(X < 27) :

Obtain the Zscore :

Z = (x - μ) / σ

Z = (27 - 27) / 2 = 0/2

Z = 0

P(Z < 0) = 0.5

D.) n = 36

P(X < 27) :

Obtain the Zscore :

Z = (x - μ) / σ/√n

Z = (27 - 27) / (2/√36) = 0/0.33333

Z = 0

P(Z < 0) = 0.5

7 0
3 years ago
Given a population of class sizes at a university in an academic year​, indicate what the sampling distribution for samples of 3
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Answer:

D

Step-by-step explanation:

sampling distribution is statistical representation of statistics of each sample.  So for a class size of 30,

A. number of samples have to be very large and defined in sampling distribtuion so this option is nullified

B. sample collection in sampling distribution is done without replacement of individuals so this option is nullified

C. this explanation doesn't match with the definition so this option is nullified

D. It is the correct option

3 0
4 years ago
The pound is a customary unit of ____.
Oksana_A [137]

The correct answer is A.

6 0
3 years ago
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